Aquatic Ecosystems Practice Quiz

An are of land that is periodically underwater is called a

• lake

• wetland

• bay

Organisms in the ocean that can not swim against currents are called

• nekton

• benthos

• plankton

Free swimming organisms that are able to swim against ocean currents are called

• plankton

• nekton

• benthos

Bottom dwelling organisms that live in shallow ocean water

• plankton

• nekton

• benthos

An area where fresh water from a river mixes with salt water from the ocean is called a(n)

• marsh

• barrier island

• estuary

In tropical areas, this type of swamp is found in coastal areas where fresh and salt water meet.

• mangrove swamp

• salt marsh

• lagoon

Limestone ridges built by tiny animals called poyps, along with the algae that lives in them are called

• rock reefs

• coral reefs

• sandy beach

Which of the following animal is considered "nekton"?

• jelly fish

• dolphin

• sea urchin

Which of the following is an example of benthic life?

• sea urchin

• dolphin

• jellyfish

Which of the following is an example of plankton?

• sea urchin

• dolphin

• jelly fish